Get access

Performance Analysis of the Mesh-Free Random Grid Method for Full-Field Synthetic Strain Measurements

Authors

  • A. P. Iliopoulos,

    1. Science Applications International Corporation, c/o Computational Multiphysics Systems Lab., Center for Computational Material Science, Naval Research Laboratory, Code 6394, Washington DC 20375, USA
    Search for more papers by this author
  • J. G. Michopoulos,

    1. Computational Multiphysics Systems Lab., Center of Computational Material Science, Naval Research Laboratory, Code 6394, Washington DC 20375, USA
    Search for more papers by this author
  • N. P. Andrianopoulos

    1. Section of Mechanics, School of Applied Mathematics and Physics, National Technical University of Athens, GR-157 73, Athens, HELLAS
    Search for more papers by this author

Abstract

Abstract:  In responding to the needs of the material characterization community, the recently developed mesh-free random grid method (MFRGM) has been exhibiting very promising characteristics of accuracy, adaptability, implementation flexibility and efficiency. To address the design specification of the method according to an intended application, we are presenting a sensitivity analysis that aids into determining the effects of the experimental and computational parameters characterizing the MFRGM in terms of its performance. The performance characteristics of the MFRGM are mainly its accuracy, sensitivity, smoothing properties and efficiency. In this paper, we are presenting a classification of a set of parameters associated with the characteristics of the experimental set-up and the random grid applied on the specimen under measurement. The applied sensitivity analysis is based on synthetic images produced from analytic solutions of specific isotropic and orthotropic elasticity boundary value problems. This analysis establishes the trends in the performance characteristics of the MFRGM that will enable the selection of the user controlled variables for a desired performance specification.

Ancillary